US3230185A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of cellular polyurethanes
Assignee: Bayer AG
•
Filing: 1962-05-02
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Granted: 1966-01-18
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Expires: 1982-05-02
Abstract
No abstract record available.
Inventors
- 👤 Kopnick Horst
- 👤 Dahm Manfred
- 👤 Delfs Detlef
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:31
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08J2375/00; C08J2375/04; C08J2483/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
IN THE PREPARATION OF A POLYURETHANE FOAM BY A PROCESS WHEREIN AN ORGANIC POLYISOCYANATE IS REACTED IN A REACTON MIXTURE CONTAINING A BLOWING AGENT WITH AN ORGANIC COMPOUND HAVING AT LEAST TWO REACTIVE HYDROGEN ATOMS WHICH ARE REACTIVE WITH AN- NCO GROUP, SAID ORGANIC COMPOUND HAVING A MOLECULAR WEIGHT OF AT LEAST ABOUT 500, THE IMPROVEMENT WHICH COMPRISES AFFECTING THE SAID REACTION WHILE THE COMPONENTS ARE IN ADMIXTURE WITH A COMPOUND HAVING THE FORMULA SELECTED FROM THE GROUP CONSISTING OF:
Claim 2
Dependent Claim
80 words
IN THE PREPARATION OF A POLYURETHANE FOAM BY A PROCESS WHEREIN AN ORGANIC POLYISOCYANATE IS REACTED IN A REACTON MIXTURE CONTAINING A BLOWING AGENT WITH AN ORGANIC COMPOUND HAVING AT LEAST TWO REACTIVE HYDROGEN ATOMS WHICH ARE REACTIVE WITH AN- NCO GROUP, SAID ORGANIC COMPOUND HAVING A MOLECULAR WEIGHT OF AT LEAST ABOUT 500, THE IMPROVEMENT WHICH COMPRISES AFFECTING THE SAID REACTION WHILE THE COMPONENTS ARE IN ADMIXTURE WITH A COMPOUND HAVING THE FORMULA SELECTED FROM THE GROUP CONSISTING OF:
References Cited (Backward Citations)
FR1212252A
Cited
US3040080A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-17 | 1969-07-19 | 1970-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-17 | 1973-07-19 | 1974-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-17 | 1977-07-19 | 1978-01-18 | $7700.00 | Window Closed / Lapsed |